<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      /*       let i = 0;
      while (i <= 10) {
        document.write("hhh<br>");
        i++;
      } */
      let i = 0;
      sum = 0;
      while (i <= 100) {
        if (i % 2 === 0) {
          sum = sum + i;
        }
        i++;
      }
      alert(sum);
    </script>
  </body>
</html>
